Improvement in force and vacuum pumps



'UNITED STATES JACOB O. JOYCE, OF DAYTON, OHIO.

\ IMPROVEMENT IN FORCE AND VACUUM PUMPS.

Vthe pump. The second part of my invention relates to the constructionand arrangement of a check-valve within avalvechamber, which acts as astrainer.

Figure 1 is a perspective view of the upper valve-chamber. Fig. 2 is aperspective view p p the check-valve chamber for the induction of of thelower valve-chamber with the ports andv passages leading to thedischarge-chamber- Fig. 3 is a vertical section of Figs. 1 and 2 on thevline x x. Fig. 4 is a vertical section through the center of thecheck-valve chamber.

The other parts of the pump, not shown in the drawing, are fullydescribed in Letters .Patent granted to me November 10, 1868, and it isnot necessary to describe them here. The ports and passages leading fromthe valvechambers to the piston, air, and discharge chambers are alsothe same as described in my said patent.

A represents the upper valve-chamber, with the removable top c aremoved. a. a a a represent holesA with threads for screws which fastenon the top. B B represent valves, attached to gudgeons b b at their top,as shown -in Fig. 1, and placed at an angle of about forty-five degrees,the inner journals of the valves bearing on the partition b. c c arescrews, which secure the packing to the valve. D is thelowervalve-chamber, and is a part of the base of the pump, the pistonand air-chamber being removed,the valves E E being hinged and arrangedas shown in Fig. 2. Iis the suction and discharge passage leading fromthe valve E. H is the suction and discharge passage for the valve E. G Gare discharge-pas sages leading' from the upper valve-chamber to theednction-pipe. ff are ilan ges for connecting the partsAA and D togetherby means of screws or bolts passing through the holes t t. V is thecheck-valve chamber, which is connected to the induction-port in suchmanner as to stand upon the base T', placed at the bottom of the well,and is divided into two parts', n n', connected by screws in the ilangeso o. p is a diaphragm, shown here as connected to the bottom of thevalvechamber n', but it may be attached to the top part, if desired. ris a valve seated on the diaphragm S S represent holes in the lower.part of 1. The valve-chamber A, composed of the v removable top a', withthe inclined hinged valves B B with journal-bearings b b and partitionand bearing b', in combination with the chamber D and port G, allarranged substan-` tially as set forth.

2. The improved check-valve and chamber V, composed of the parts n n',diaphragm pp, valve r, orifices s s, and base T, all combined andarranged substantially ,as set forth.

A 1 JACOB O. JOYCE.

Witnesses: y

O. M. GoTTscHALL,

T. H. GRTDLAND.

OFFICE.

